JP3408069B2 - Liquid coating device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid agent applying device for applying a liquid agent onto a target object such as a liquid crystal panel substrate from a needle at the tip of a nozzle, and more particularly to a desired liquid agent pattern on the target object. The present invention relates to a liquid agent coating device that directly paints and draws on.

[0002]

2. Description of the Related Art A liquid agent applying device is a device for discharging a viscous liquid agent having fluidity from a needle to apply an arbitrary liquid agent pattern on an object to be coated. For example, application and formation of a sealing material for bonding liquid crystal panels. Used for.

As shown in FIG. 13, a conventional liquid agent applying device discharges a liquid agent filled in a nozzle 51 from a needle 52 onto an object 54 to be coated placed on a table 53, and the needle 52 and the object to be coated. By keeping the distance to the application body 54 constant and moving the table 53 relative to the needle 52, an arbitrary liquid agent pattern 55 is applied onto the application body 54. The table 53 has a structure that can be moved in the X and Y directions.

When it is necessary to form a plurality of liquid agent patterns 55 having the same shape on the same object 54 to be coated, 1
The method of applying the liquid agent with the nozzle 51 of the book requires a considerable amount of time and is not practical. For this reason, as shown in FIG. 14, a method of shortening the application time of the liquid agent by using a plurality of nozzles 51 has been proposed.

Also in the method using a plurality of nozzles 51 shown in FIG. 14, while the liquid agent filled in the nozzles 51 is discharged from the needles 52 onto the object 54 to be coated placed on the table 53, The table 53 is structured such that an arbitrary liquid agent pattern 55 is applied onto the object to be coated 54 by keeping the distance to the object to be coated 54 constant and moving the table 53 relative to the needle 52. Has a structure capable of moving in the X and Y directions.

[0006]

A problem with the liquid agent applying device using a plurality of nozzles is that the applied liquid agent is different from the ideal liquid agent applied state due to the variation in the distance between each nozzle and the object to be applied. The film thickness of the pattern varies.

Further, even if the thickness of the applied liquid agent pattern is proper, the line width and the cross-sectional area of the applied liquid agent pattern vary due to the processing tolerance of the needle and the viscosity and thixo ratio of the liquid agent. .

Further, the line width of the applied liquid agent pattern,
Even if the film thickness and cross-sectional area are appropriate, the following problems occur at the application start point and the end point of the liquid agent due to the processing tolerance of the needle and the viscosity and thixo ratio of the liquid agent.

At the starting point, the liquid agent adhering to the tip of each needle is sucked with a negative pressure before applying the liquid agent, but if suction with this negative pressure is insufficient,
When the cross-sectional area of the applied liquid agent pattern becomes large and suction is performed by negative pressure excessively, the liquid agent is delayed in ejection and the liquid agent pattern becomes short.

At the end point, the liquid agent pattern is shortened when the liquid agent application end timing is early, and the liquid agent pattern cross-sectional area is large when the liquid agent application end timing is late.

As described above, when the liquid agent pattern applied between the nozzles has variations in the line width, film thickness, cross-sectional area, and the position and cross-sectional area of the application start point and end point, it adversely affects subsequent steps. It will be.

As a method of correcting the above-mentioned problems, a trial and error setting of parameters that influence the state of the applied liquid agent pattern is made by human intuition and experience from the measurement results using a cross-sectional area measuring instrument or the like. However, it requires time and labor, and requires a certain degree of proficiency for the operator.

The present invention has been made in view of the conventional problems as described above, and the line width, film thickness, cross-sectional area of the applied liquid agent pattern, and the position and cross-sectional area of the application start point and the end point are determined. It is an object of the present invention to provide a liquid agent application device capable of automatically changing a parameter that influences the state of the applied liquid agent pattern so that a desired value can be measured and obtained.

[0014]

In order to achieve the above-mentioned object, a liquid agent applying apparatus according to claim 1 of the present invention applies a liquid agent from a needle at a tip of a nozzle onto an object to be coated, In a liquid agent applying device for forming a pattern, it is optimal based on the measurement means for measuring the position, line width, film thickness and cross-sectional area of the liquid agent pattern applied on the object to be coated, and the data obtained from the measuring means. And a calculation processing unit configured to calculate the different coating conditions and set the calculated coating conditions. The calculation processing unit affects the line width, the film thickness, and the cross-sectional area of the solvent pattern in the first step as the coating conditions. It is characterized in that the parameters are calculated, the parameter affecting the application end point of the solvent pattern is calculated in the second step, and the parameter affecting the application start point of the solvent pattern is calculated in the third step.

[0015]

According to a second aspect of the present invention, there is provided the liquid agent applying device according to the first aspect.
In the liquid agent applying device according to the item (1), the liquid agent pattern is applied under a plurality of applying conditions, each of the liquid agent patterns is measured by the measuring means, and the liquid agent pattern in the optimum applied state is selected by the arithmetic processing means. I am trying.

[0017]

According to the liquid agent applying apparatus of the present invention, the liquid agent is applied from the needle at the tip of the nozzle onto the object to be coated to form an arbitrary liquid agent pattern. Position of the liquid agent pattern, line width, measuring means for measuring the film thickness and cross-sectional area, and calculate the optimum coating conditions based on the data obtained from the measuring means,
And a calculation processing unit for setting the calculated coating conditions, wherein the calculation processing unit calculates, as the coating conditions, parameters that affect the line width, the film thickness, and the cross-sectional area of the solvent pattern in the first step, and the second step. By calculating the parameters that affect the application end point of the solvent pattern with, and by calculating the parameters that affect the application start point of the solvent pattern in the third step, set multiple parameters that affect each other to optimal values. You can

[0019]

Further, by applying the liquid agent pattern under a plurality of application conditions, measuring each liquid agent pattern by the measuring means, and selecting the most suitable applied liquid agent pattern by the arithmetic processing means, It is possible to obtain an optimally applied liquid agent pattern regardless of the proficiency level.

[0021]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS.

The configuration of the liquid agent applying device of the present invention will be described with reference to FIG. FIG. 1 is a conceptual diagram showing a liquid agent applying device according to the present invention.

From the data measured by the measuring means consisting of the slit light source 1, the camera 2, the illumination 3 and the half mirror 4, the arithmetic processing means 5 calculates the optimum application conditions, and the arithmetic processing means 5 controls the liquid agent discharge control means 6. Set the coating conditions.

The liquid agent discharge control means 6 discharges the liquid agent filled in the nozzle 7 from the needle 8 based on the set coating conditions. Then, the table 10 is driven by the table drive mechanism 9, and a liquid agent pattern 12 is applied by drawing on the object to be coated 11 such as a liquid crystal panel substrate placed on the table 10.

Next, the measuring means will be described. The line width, the film thickness, and the cross-sectional area of the liquid agent pattern 12 are obtained by using the slit light source 1 and capturing a light-section image of the liquid agent pattern 12 with the camera 2. Instead of the camera 2, an optical distance meter may be used to obtain the line width, the film thickness, and the cross-sectional area of the liquid agent pattern 12.

Regarding the position of the liquid agent pattern 12, the position of the liquid agent pattern 12 is obtained by capturing an image with the camera 2 using the illumination 3 and the half mirror 4. Camera 2
The line width, the film thickness, and the cross-sectional area of the liquid agent pattern 12 may be used for both the measurement and the position measurement, or may be provided separately. The camera 2, the illumination 3, and the half mirror 4 may use a coaxial incident type illuminated camera.

Optimum coating conditions are calculated and set by the arithmetic processing means 5 from the data measured by the above-mentioned measuring means. The parameters which influence the coating state of the liquid agent pattern 12 are as follows. Can be mentioned.

Regarding the line width, film thickness and cross-sectional area of the liquid agent pattern 12, there is the distance between the needle 8 and the object to be coated 11 and the liquid agent discharge pressure. Regarding the position of the application starting point and the cross-sectional area, the application start timing, There is a suction pressure of the liquid agent adhering to the needle tip and a suction time of the liquid agent adhering to the needle tip, and there is a timing for ending the coating with respect to the position and cross-sectional area of the application end point.

These parameters are not independent, and if one of the parameters is changed, they affect each other. Therefore, when setting the coating conditions, the order of setting is important. The parameters that affect the line width, film thickness and cross-sectional area of the liquid agent pattern 12 are set in the first step, the parameters that affect the application end point are set in the second step, and the parameters that affect the application start point are set in the third step. It is necessary to set through the three steps of

(Embodiment 1) Regarding the relationship between the coating state of the liquid agent pattern 12 and each parameter in the first step,
This will be described with reference to FIGS. 2 and 3. FIG. 2 is a plan view illustrating a coating state of the liquid agent pattern 12 in the first stage, FIG.
FIG. 3 is a sectional view taken along the line AA of FIG.

The parameters that affect the line width, film thickness and cross-sectional area of the liquid agent pattern 12 are the needle 8 and the object 11 to be coated.
And the liquid agent discharge pressure, and the relative speed between the table 10 and the needle 8, that is, the coating speed is usually fixed in production, and is therefore excluded from the parameters.

When each parameter has an optimum value, the liquid agent pattern 12 as shown by a is applied. When the distance between the needle 8 and the object to be coated 11 is long, the film thickness of the liquid agent pattern 12 becomes thick as shown in b, and when the distance between the needle 8 and the object to be coated 11 is short, the liquid agent pattern 12 becomes thicker as shown in c. The film thickness becomes thin. Even if the distance between the needle 8 and the object to be coated 11 is an appropriate value, the line width becomes thin as shown by d when the liquid discharge pressure is low, and the line width becomes thick as e when the liquid discharge pressure is high. Become.

A method of setting the optimum coating conditions in the first stage will be described with reference to FIG. FIG. 4 is a flow chart for explaining the optimum coating condition setting method in the first embodiment in the first stage. S in the figure means a step.

The distance between the needle 8 and the object 11 to be coated and the liquid agent discharge pressure are initialized (step S101), and the liquid agent pattern 12 is applied onto the object 11 to be coated (step S10).
2). Initialization means setting to a value that is considered to be optimum coating conditions.

When the line width of the liquid agent pattern 12 is equal to the outer diameter of the needle 8, it is known that the film thickness of the liquid agent pattern 12 accurately indicates the distance between the needle 8 and the object 11 to be coated, and therefore the measuring means. The line width of the liquid agent pattern 12 is measured by (step S103).

The line width of the liquid agent pattern 12 is measured at a portion other than the application start point and the end point where a stable liquid agent pattern 12 is obtained, for example, the midpoint of application.

The optimum value of the line width of the liquid agent pattern 12 set in advance by the arithmetic processing means 5 and step S
The deviation from the line width of the liquid agent pattern 12 measured in 103 is obtained (step S104). If there is a deviation, the arithmetic processing means 5 corrects the liquid agent discharge pressure using the automatic control theory (step S105), and the step Return to S102.

When the line width of the liquid agent pattern 12 is thicker than the optimum value, the liquid agent discharge pressure is set low and the liquid agent pattern 12 is set.
When the line width of is smaller than the optimum value, the liquid agent discharge pressure is set high.

Since the liquid agent discharge pressure cannot be corrected in real time, the liquid agent application, the line width measurement of the liquid agent pattern 12 and the liquid agent discharge pressure correction are repeated, and the line width of the liquid agent pattern 12 with respect to the outer diameter of the needle 8. Steps S102 to S105 are performed until ± 10 μm is satisfied.

In step S104, step S1
If the line width of the liquid agent pattern 12 applied in 02 satisfies ± 10 μm with respect to the outer diameter of the needle 8, the liquid agent pattern 12 for film thickness correction of the liquid agent pattern 12 is applied under the same conditions (step S106), The film thickness of the liquid agent pattern 12 is measured by the measuring means (step S107).

The optimum value of the film thickness of the liquid agent pattern 12 set in advance by the arithmetic processing means 5 and step S
A deviation from the film thickness of the liquid agent pattern 12 measured in 107 is obtained (step S108), and if there is a deviation, the arithmetic processing means 5 corrects the distance between the needle 8 and the object to be coated 11 (step S109). It returns to step S106.

When the film thickness of the liquid agent pattern 12 is thicker than the optimum value, the distance between the needle 8 and the article 11 is set short, and when the film thickness of the liquid agent pattern 12 is thinner than the optimum value,
The distance between the needle 8 and the body 11 to be coated is set long. For example, when the optimum value of the film thickness of the liquid agent pattern 12 is 30 μm and the film thickness of the liquid agent pattern 12 measured in step S107 is 25 μm, the distance between the needle 8 and the coated object 11 is 5 μm shorter.

Since the distance between the needle 8 and the object 11 to be coated cannot be corrected in real time, liquid agent coating,
The measurement of the film thickness of the liquid agent pattern 12 and the correction of the distance between the needle 8 and the article 11 are repeated, and steps S106 to S109 are performed until the film thickness of the liquid agent pattern 12 satisfies ± 1 μm with respect to the preset optimum value. .

In step S108, step S1
If the film thickness of the liquid agent pattern 12 applied in 06 satisfies ± 1 μm with respect to the preset optimum value, the liquid agent pattern 12 for correcting the cross-sectional area of the liquid agent pattern 12 is applied under the same conditions (step S110). The measuring means measures the cross-sectional area of the liquid agent pattern 12 (step S11).
1).

The arithmetic processing means 5 obtains a deviation between the optimum cross-sectional area of the liquid medicine pattern 12 set in advance and the cross-sectional area of the liquid medicine pattern 12 measured in step S111 (step S112). First, the arithmetic processing means 5 corrects the liquid agent discharge pressure using the automatic control theory (step S113), and returns to step S110.

When the cross-sectional area of the liquid agent pattern 12 is larger than the optimum value, the liquid agent discharge pressure is set low, and when the cross-sectional area of the liquid agent pattern 12 is smaller than the optimum value, the liquid agent discharge pressure is set high.

Since the liquid agent discharge pressure cannot be corrected in real time, the liquid agent application, the measurement of the cross-sectional area of the liquid agent pattern 12 and the correction of the liquid agent discharge pressure are repeated, and the cross-sectional area of the liquid agent pattern 12 is preset. Until the optimum value of the cross-sectional area of 12 is ± 5%,
Steps S110 to S113 are performed.

In step S112, step S1
If the cross-sectional area of the liquid agent pattern 12 applied in 10 satisfies ± 5% of the preset optimum value, the liquid agent discharge pressure and the distance between the needle 8 and the object 11 are applied to the application data file of the production pattern. And set it as a production condition (step S114), and the setting of the optimum coating condition in the first stage is completed.

As the second and third steps, the parameters that affect the positions and cross-sectional areas of the coating start point and the end point are set. When setting the optimum coating conditions in the second and third steps, The premise is that the setting of the optimum coating conditions in the first stage has been completed.

Since the setting of the optimum coating conditions in the first stage is completed, the line width, the film thickness and the cross-sectional area of the liquid agent pattern 12 are constant except for the coating start point and the end point. Also, since there is no adverse effect on the setting of the optimum coating conditions in the third stage, it is only necessary to correct the positions and cross-sectional areas of the coating start point and the end point, and the optimal coating conditions can be set smoothly. .

The relationship between the coating state of the liquid agent pattern 12 and each parameter in the second stage will be described with reference to FIGS. 5 and 6. FIG. 5 is a plan view illustrating a coating state of the liquid agent pattern 12 in the second and third stages, and FIG. 6 is a cross-sectional view taken along the line BB of FIG. The line BB in FIG. 5 indicates the vicinity of the application end point of the liquid agent pattern 12.

The parameter that affects the position and the cross-sectional area of the application end point of the liquid agent pattern 12 is the application end timing, and the relative speed between the table 10 and the needle 8, that is, the application speed is usually fixed in production. Therefore, it is excluded from the parameters.

When the application end timing is the optimum value, the application state of the liquid agent pattern 12 as shown by f is obtained. When the application end timing is early, the application ends without applying the liquid agent pattern 12 to the set position as in i, and when the application end timing is late, the cross-sectional area of the application end point of the liquid agent pattern 12 increases as in j.

A method of setting the optimum coating conditions in the second stage will be described with reference to FIG. FIG. 7 is a flow chart for explaining the optimum coating condition setting method in the first embodiment in the second stage. S in the figure means a step.

The application end timing is initialized (step S201), and the liquid agent pattern 12 is applied onto the article 11 to be coated (step S202). Initialization means setting to a value that is considered to be optimum coating conditions.

The end point position of the liquid agent pattern 12 is measured by the measuring means (step S203). Then, the arithmetic processing means 5 compares the preset position of the end point position of the liquid agent pattern 12 with the end point position of the liquid agent pattern 12 measured in step S203 (step S204), and the liquid agent pattern 12 is set at the set position. If there is not, the setting position and the liquid agent pattern 1 are calculated by the arithmetic processing means 5.
The application end timing is delayed based on the distance from the end point position of 2 (step S205), and the process returns to step S202.

Since it is not possible to correct the application end timing in real time, liquid application, liquid pattern 1
Repeat the measurement of the end point position of 2 and the correction of the application end timing so that the end point position of the liquid agent pattern 12 is ±
Steps S202 to S202 until the thickness reaches 30 μm
Perform 205.

In step S204, step S2
If the end point position of the liquid agent pattern 12 applied in 02 is ± 30 μm with respect to the set position, the measuring means measures the cross-sectional area of the application end point (step S206).

The position for measuring the cross-sectional area at the end of coating is
It is desirable to measure a position about 300 μm away from the application end point, but the position is not limited to 300 μm and may be any part affected by transient characteristics at the end of application.

The calculation processing means 5 compares the preset optimum cross-sectional area of the application end point of the liquid agent pattern 12 with the cross-section area of the application end point of the liquid agent pattern 12 measured in step S206 (step S207). If the cross-sectional area of the application end point is small, the process returns to step S205, the arithmetic processing means 5 delays the application end timing based on the deviation from the optimum value, and the process returns to step S202. When the cross-sectional area of the application end point is large, the arithmetic processing means 5 advances the application end timing based on the deviation from the optimum value (step S208), and step S2.
Return to 02.

Since the application end timing cannot be corrected in real time, liquid agent application, liquid agent pattern 1
The measurement of the cross-sectional area at the end point 2 and the correction of the application end timing are repeated, and steps S202 to S208 are performed until the cross-sectional area at the end point of the liquid agent pattern 12 satisfies ± 5% of the optimum value.

In step S207, step S2
If the cross-sectional area of the application end point of the liquid agent pattern 12 applied in 02 meets ± 5% with respect to the preset optimum value, the application end timing is copied to the application data file of the production pattern and used as the production condition. The setting is performed (step S209), and the setting of the optimum coating conditions in the second stage is completed.

The relationship between the coating state of the liquid agent pattern 12 and each parameter in the third stage will be described with reference to FIGS. 5 and 8. FIG. 8 is a sectional view taken along the line CC of FIG. The line C-C in FIG. 5 indicates the vicinity of the application start point of the liquid agent pattern 12.

The parameters that affect the position of the application start point and the cross-sectional area of the liquid agent pattern 12 are the application start timing, the suction pressure of the liquid agent adhering to the needle tip and the suction time of the liquid agent adhering to the needle tip, and the relative speed between the table 10 and the needle 8. That is, since the coating speed is usually fixed in production, it is excluded from the parameters.

Among the parameters that affect the position of the coating start point and the cross-sectional area, the coating start timing and the suction time of the liquid agent adhering to the needle tip are set in advance for each viscosity and thixo ratio of the liquid agent used and for each production pattern. Since it can be fixed once it is set according to the optimum value, only the suction pressure of the liquid agent adhering to the needle tip needs to be corrected and set.

When the suction pressure of the liquid material adhering to the needle tip is the optimum value, the liquid material pattern 12 as shown by f is applied. When the suction pressure of the liquid agent adhering to the needle tip is low, the liquid agent adhering to the needle tip cannot be completely sucked up, and the liquid agent is rubbed at the application start point as shown in g, resulting in a large cross-sectional area. Since the air is sucked into the needle 8 together with the liquid agent, the liquid agent pattern 12 is not applied at the application start point like h.

A method of setting the optimum coating conditions in the third stage will be described with reference to FIG. FIG. 9 is a flowchart for explaining the optimum coating condition setting method in the third step. S in the figure means a step.

The suction pressure of the liquid agent attached to the needle tip is initialized (step S301), and the liquid agent pattern 12 is applied to the object 1 to be coated.
1 is applied (step S302). Initialization means setting to a value that is considered to be optimum coating conditions.

The position of the starting point of the liquid agent pattern 12 is measured by the measuring means (step S303). Then, the arithmetic processing means 5 compares the preset position of the starting point position of the liquid agent pattern 12 with the starting point position of the liquid agent pattern 12 measured in step S303 (step S304), and the liquid agent is placed at the setting position. If there is no pattern 12, the calculation processing means 5 lowers the needle tip-adhered liquid agent suction pressure based on the distance between the set position and the start point position of the liquid agent pattern 12 (step S305), and returns to step S302.

Since the suction pressure of the liquid agent adhering to the needle tip cannot be corrected in real time, the application of the liquid agent, the measurement of the starting point position of the liquid agent pattern 12 and the correction of the suction pressure of the liquid agent adhering to the needle tip are repeated to determine the starting point position of the liquid agent pattern 12. Step S until the set position is ± 30 μm
Steps 302 to S305 are performed.

In step S304, step S3
If the starting point position of the liquid agent pattern 12 applied in 02 is ± 30 μm with respect to the set position, the measuring means measures the cross-sectional area of the applying start point (step S30).
6).

The position at which the cross-sectional area of the coating start point is measured is preferably a position about 300 μm away from the coating start point, but it is not limited to 300 μm, and the influence of transient characteristics at the start of coating is It only has to be the part to receive.

The arithmetic processing means 5 compares the preset cross-sectional area of the application starting point of the liquid agent pattern 12 with the cross-sectional area of the application starting point of the liquid agent pattern 12 measured in step S306 (step S307), if the cross-sectional area of the application start point is small, step S305
Returning to step S302, the suction pressure of the liquid agent adhering to the needle tip is lowered based on the deviation from the optimum value, and the process returns to step S302. When the cross-sectional area of the application start point is large, the suction pressure of the needle tip adhering liquid agent is increased by the arithmetic processing means 5 based on the deviation from the optimum value (step S308), and step S30.
Return to 2.

Since the suction pressure of the liquid agent adhering to the needle tip cannot be corrected in real time, the application of the liquid agent, the measurement of the cross-sectional area of the starting point of the liquid agent pattern 12 and the correction of the suction pressure of the liquid agent adhering to the needle tip are repeated to obtain the starting point of the liquid agent pattern 12. Steps S302 to S308 are performed until the cross-sectional area of 5 satisfies ± 5% of the optimum value.

In step S307, step S3
If the cross-sectional area of the application start point of the solution pattern 12 applied in 02 meets ± 5% of the preset optimum value, the needle tip attached solution suction pressure is copied to the application data file of the production pattern to produce (Step S309), the setting of the optimum coating conditions in the third stage is finished, and the setting of all the coating conditions is finished.

The liquid agent pattern 12 for setting the optimum coating conditions in the first stage is preferably a pattern having a coating speed equal to that at the time of production and including many straight line portions using all the nozzles 7. It is not necessary to have a pattern that fills in, and it is sufficient to apply a simple pattern such as a straight line in order to apply and correct it repeatedly.

As for the liquid agent pattern 12 when setting the optimum coating conditions in the second stage, the coating speed is the same as that in the production and all the nozzles 7 are used, as in the first stage.
A pattern including a large number of straight line portions using is preferable and does not need to be a pattern that fills the entire body 11 to be coated. Since a simple pattern such as a straight line is used for applying and correcting repeatedly. Application is sufficient.

As for the liquid agent pattern 12 for setting the optimum coating conditions in the third step, it is difficult to use a simple pattern such as a straight line as in the first and second steps.

If the moving time of the nozzle 7 from the application end point to the next application start point is different, the amount of the liquid agent attached to the tip of the needle 8 is different. This is because if the production pattern is applied by performing a simple pattern, the suction pressure of the liquid agent adhering to the needle tip will not be set to the optimum value.

Therefore, as the liquid agent pattern 12 for setting the optimum coating conditions in the third stage, the liquid agent pattern 12 is simple in that the moving time of the nozzle 7 from the coating end point to the next coating start point is completely equal to the production pattern. It is desirable to use different patterns or production patterns.

When setting the optimum coating conditions in the first to third steps, the liquid agent pattern 12 is repeated many times.
Is applied on the object 11 to be coated, the liquid agent pattern 12 may protrude from the object 11 to be coated.

Therefore, it is necessary to perform the following coating pretreatment. This coating pretreatment will be described with reference to FIG. FIG. 10 is a flowchart illustrating a method of pretreatment for coating.

The position of the liquid agent pattern 12 on the object to be coated 11 is measured using the measuring means (step S401), and the arithmetic processing means 5 determines whether the next liquid agent pattern 12 can be applied to the object to be coated 11. (Step S402).

In step S402, the object to be coated 11
When it is determined that the next liquid material pattern 12 can be applied, the pre-application process is ended.

On the other hand, if it is determined in step S402 that the next liquid agent pattern 12 cannot be applied onto the object 11 to be coated, the arithmetic processing means 5 requests another new object 11 to be coated (step S403) and the It is confirmed whether or not the new object 11 to be coated has been set (step S404).

If another new object 11 is not set in step S404, step S40.
Returning to step 3, another new object to be coated 11 is requested again, and when another new object to be coated 11 is set, the coating pretreatment is ended.

(Embodiment 2) The relationship between the application state of the liquid agent pattern 12 and each parameter at the first stage is as described in Embodiment 1 with reference to FIGS. 2 and 3.

A method of setting the optimum coating conditions in the first stage will be described with reference to FIG. FIG. 11 is a flow chart for explaining the optimum coating condition setting method in the second embodiment in the first stage. S in the figure means a step.

The distance between the needle 8 and the object to be coated 11 and the setting range of the liquid agent discharge pressure are manually set (step S5).
01), a large number of liquid agent patterns 12 are applied under as many conditions as possible within the range (step S502).

The line width, film thickness and cross-sectional area of the liquid agent pattern 12 applied in large numbers are measured by the measuring means (step S503), and the liquid agent pattern 12 closest to the preset optimum value is calculated by the arithmetic processing means 5. It is detected (step S504).

Liquid agent pattern 1 closest to the optimum value
2 is ± with respect to the outer diameter of the needle 8 whose line width is the optimum value.
The arithmetic processing means 5 determines whether or not the production standard value of 10 μm, the film thickness ± 1 μm with respect to the optimum value, and the cross-sectional area ± 5% with respect to the optimum value are satisfied (step S50).
5).

In step S505, when the liquid agent pattern 12 does not satisfy the production standard value, step S5
Returning to 01, the distance between the needle 8 and the object to be coated 11 and the setting range of the liquid agent discharge pressure are manually narrowed, and steps S501 to S505 are performed until the liquid agent pattern 12 satisfies the production reference value.

On the other hand, in step S505, when the liquid agent pattern 12 satisfies the production standard value, the distance between the needle 8 and the object 11 to be coated and the liquid agent discharge pressure are copied to the coating data file of the production pattern and used for production. This is set as a condition (step S506), and the setting of the optimum coating condition in the first stage is completed.

The relationship between the coating state of the liquid agent pattern 12 and each parameter in the second stage is as described in the first embodiment with reference to FIGS. 5 and 6.

A method of setting the optimum coating conditions in the second stage will be described with reference to FIG. FIG. 12 is a flow chart for explaining the optimum coating condition setting method in the second embodiment in the second stage. S in the figure means a step.

The setting range of the application end timing is manually set (step S601), and a large number of liquid agent patterns 12 are applied under as many conditions as possible within that range (step S602).

The end point position and the cross-sectional area of the end point of the applied liquid agent pattern 12 are measured by the measuring means (step S603), and the arithmetic means 5 detects the liquid agent pattern 12 closest to the preset optimum value. Yes (step S604).

The liquid agent pattern 1 closest to the optimum value
In No. 2, the arithmetic processing unit 5 determines whether or not the end point position is within ± 30 μm with respect to the set position and the cross-sectional area of the end point satisfies the production reference value of ± 5% with respect to the optimum value (step S605).

In step S605, if the liquid agent pattern 12 does not meet the production standard value, step S6.
Returning to 01, the setting range of the application end timing is manually narrowed, and steps S601 to S605 are performed until the liquid agent pattern 12 satisfies the production reference value.

On the other hand, if the liquid agent pattern 12 satisfies the production reference value in step S605, the application end timing is copied to the application data file of the production pattern and set as the production condition (step S60).
6) Then, the setting of the optimum coating conditions in the second stage is completed.

The relationship between the application state of the liquid agent pattern 12 and each parameter in the third stage is as described in the first embodiment with reference to FIGS. 5 and 8.

The optimum coating condition setting method in the third stage is as described in the first embodiment with reference to FIG. This is because a simple pattern such as a straight line is sufficient for setting the optimum coating conditions in the first and second stages, but in the setting of the optimum coating conditions in the third stage, the next coating start from the coating end point. Since it is desirable to use a simple pattern or a production pattern in which the moving time of the nozzle 7 to the point is completely equal to the production pattern,
This is because it becomes difficult to apply a large number of liquid agent patterns 12 onto the article 11 to be coated.

In the second embodiment as well, it is necessary to perform the pretreatment for coating, and it is performed as described in the first embodiment with reference to FIG.

[0104]

[0105]

According to the liquid agent applying apparatus of the present invention, the liquid agent is applied onto the object to be coated from the needle at the tip of the nozzle to form an arbitrary liquid agent pattern. Position of the liquid agent pattern, line width,
The processing means has a measuring means for measuring the film thickness and the cross-sectional area, and an arithmetic processing means for calculating an optimum coating condition based on the data obtained from the measuring means and setting the calculated coating condition. Is a coating condition. In the first step, parameters affecting the line width, film thickness, and cross-sectional area of the solvent pattern are calculated, in the second step, parameters affecting the coating end point of the solvent pattern are calculated, and in the third step, the solvent is calculated. By calculating the parameters that affect the application start point of the pattern, it is possible to set multiple parameters that affect each other to the optimum values, so even a worker with low proficiency can save time and effort. Optimal coating conditions can be set without the need.

[0106]

Further, by applying the liquid agent pattern under a plurality of application conditions, measuring each liquid agent pattern by the measuring means, and selecting the most suitable applied liquid agent pattern by the arithmetic processing means, It is possible to obtain an optimally applied liquid agent pattern regardless of the proficiency level.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a liquid agent applying device according to the present invention.

FIG. 2 is a plan view illustrating a coating state of a liquid agent pattern in a first stage.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a flowchart illustrating a method of setting optimum coating conditions according to the first embodiment in the first stage.

FIG. 5 is a plan view illustrating a coating state of liquid agent patterns in the second and third stages.

6 is a cross-sectional view taken along the line BB of FIG.

FIG. 7 is a flowchart illustrating a method of setting optimum coating conditions according to the first embodiment in the second stage.

8 is a cross-sectional view taken along the line CC of FIG.

FIG. 9 is a flowchart illustrating a method of setting optimum coating conditions in a third step.

FIG. 10 is a flowchart illustrating a method of pretreatment for coating.

FIG. 11 is a flowchart illustrating a method of setting optimum coating conditions according to the second embodiment in the first stage.

FIG. 12 is a flowchart illustrating a method of setting optimum coating conditions according to the second embodiment in the second stage.

FIG. 13 is a perspective view showing a main part of a conventional liquid agent applying device.

FIG. 14 is a perspective view showing a main part of a conventional liquid agent applying device using a plurality of nozzles.

[Explanation of symbols]

1 slit light source 2 camera 3 lighting 4 half mirror 5 Processing means 6 Liquid agent discharge control means 7 nozzles 8 needles 9 Table drive mechanism 10 tables 11 Body to be coated 12 liquid agent pattern 51 nozzles 52 needle 53 tables 54 coated object 55 liquid agent pattern

Claims (2)

(57) [Claims] 1. A liquid agent applying device for applying a liquid agent onto an object to be coated from a needle at the tip of a nozzle to form an arbitrary liquid agent pattern, the position of the liquid agent pattern applied to the object to be coated, the line width, And an arithmetic processing unit configured to calculate an optimum coating condition based on the data obtained from the measuring unit and set the calculated coating condition. Is a coating condition. In the first step, parameters affecting the line width, film thickness, and cross-sectional area of the solvent pattern are calculated, in the second step, parameters affecting the coating end point of the solvent pattern are calculated, and in the third step, the solvent is calculated. A liquid agent applying device, which calculates a parameter that influences an application starting point of a pattern. 2. The liquid agent pattern is applied under a plurality of application conditions, each liquid agent pattern is measured by the measuring means, and the liquid agent pattern in the optimum applied state is selected by the arithmetic processing means. Item 1. The liquid agent applying device according to item 1.